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-rw-r--r--libc-symbols.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/libc-symbols.h b/libc-symbols.h
index b41c956efe..83773bfdc9 100644
--- a/libc-symbols.h
+++ b/libc-symbols.h
@@ -96,13 +96,18 @@ Cambridge, MA 02139, USA. */
#define weak_alias(original, alias) \
.weak C_SYMBOL_NAME (alias); \
C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original)
+
+/* Declare SYMBOL to be weak. */
+#define weak_symbol(symbol) .weak C_SYMBOL_NAME (symbol)
#else
+#define weak_symbol(symbol) asm (".weak " __SYMBOL_PREFIX #symbol);
#define weak_alias(original, alias) \
asm (".weak " __SYMBOL_PREFIX #alias "\n" \
__SYMBOL_PREFIX #alias " = " __SYMBOL_PREFIX #original);
#endif
#else
#define weak_alias(original, alias) strong_alias(original, alias)
+#define weak_symbol(symbol) /* Do nothing. */
#endif